cubietruck mmc panic

[Robert Swindells <rjs%fdy2.co.uk@localhost>]

I'm getting a panic on my cubietruck at startup:

awinmmc0 at awinio0 port 0: SD/MMC interface
panic: kernel diagnostic assertion "ok" failed: file 
"../../../../arch/arm/arm32/pmap.c", line 7843 
Stopped in pid 0.1 (system) at  netbsd:cpu_Debugger+0x4:        bx      r14
db> bt
0x80515c4c: netbsd:vpanic+0xc
0x80515c64: netbsd:__udivmoddi4
0x80515c9c: netbsd:pmap_map_poolpage+0x64
0x80515cd4: netbsd:_bus_dmamem_map+0x1f8
0x80515d34: netbsd:awin_mmc_attach+0x238
0x80515d6c: netbsd:config_attach_loc+0x1b4
0x80515d84: netbsd:config_attach+0x24
0x80515e14: netbsd:awinio_attach+0x1b0
0x80515e4c: netbsd:config_attach_loc+0x1b4
0x80515e64: netbsd:config_attach+0x24
0x80515e9c: netbsd:mainbussearch+0x90
0x80515eb4: netbsd:mapply+0x30
0x80515f04: netbsd:config_search_loc+0x11c
0x80515f1c: netbsd:config_search_ia+0x1c
0x80515f54: netbsd:config_attach_loc+0x1b4
0x80515f7c: netbsd:config_rootfound+0x48
0x80515f94: netbsd:cpu_configure+0x34
0x80515fec: netbsd:main+0x268
0x80515ffc: netbsd:kernel_text+0x50
db>